fix(catalog): route main's grok-4.6 through first-party Responses

origin/main added grok-4.6 as Chat Completions on paid xai and as an
uncurated SuperGrok row. Keep the Responses migration complete by
allowlisting the id, seeding xai-oauth, and baking the same 4-tier
effort map as grok-4.5.

packages/catalog/CHANGELOG.md

@@ -20,6 +20,7 @@
 - Removed unsupported `xhigh` (and `max`) thinking tiers from first-party Grok 4.5 / 4.3 / 3-mini Responses rows; leftover `xhigh`/`max` requests clamp to `high`. `grok-4.20-multi-agent*` still advertises unmapped `xhigh` (16-agent mode).
 - Stopped baking `reasoningEffortMap` on first-party xAI catalog rows that omit `reasoning.effort` (`omitReasoningEffort: true`).
 - Suppressed presence/frequency penalties on every first-party xAI Responses model, including non-reasoning ids such as `grok-2`; xAI's `/v1/responses` marks those fields unsupported.
+- Routed `grok-4.6` (added on main) through first-party xAI Responses with the same 4-tier effort allowlist as `grok-4.5`, instead of leaving the paid row on Chat Completions.
 
 ## [17.3.4] - 2026-08-14
 

packages/catalog/src/identity/family.ts

@@ -110,7 +110,13 @@ export const isGrokModelId = memo((modelId: string): boolean => {
 	return /(?:^|[./_-])grok(?:[-.]|$)/i.test(modelId);
 });
 
-const GROK_EFFORT_CAPABLE_PREFIXES = ["grok-3-mini", "grok-4.20-multi-agent", "grok-4.3", "grok-4.5"] as const;
+const GROK_EFFORT_CAPABLE_PREFIXES = [
+	"grok-3-mini",
+	"grok-4.20-multi-agent",
+	"grok-4.3",
+	"grok-4.5",
+	"grok-4.6",
+] as const;
 
 /**
  * Grok SKUs that expose the wire `reasoning.effort` dial. Other Grok reasoners

packages/catalog/src/models.json

@@ -104446,7 +104446,7 @@
 		"grok-4.6": {
 			"id": "grok-4.6",
 			"name": "Grok 4.6",
-			"api": "openai-completions",
+			"api": "openai-responses",
 			"provider": "xai",
 			"baseUrl": "https://api.x.ai/v1",
 			"reasoning": true,
@@ -104469,7 +104469,19 @@
 					"low",
 					"medium",
 					"high"
-				]
+				],
+				"effortMap": {
+					"minimal": "low"
+				}
+			},
+			"compat": {
+				"reasoningEffortMap": {
+					"minimal": "low",
+					"xhigh": "high",
+					"max": "high"
+				},
+				"supportsReasoningEffort": true,
+				"omitReasoningEffort": false
 			}
 		},
 		"grok-beta": {
@@ -104781,13 +104793,31 @@
 			},
 			"contextWindow": 500000,
 			"maxTokens": 500000,
+			"thinking": {
+				"mode": "effort",
+				"efforts": [
+					"minimal",
+					"low",
+					"medium",
+					"high"
+				],
+				"effortMap": {
+					"minimal": "low"
+				}
+			},
 			"supportsComputerUse": false,
 			"supportsComputerUseConfig": false,
 			"compat": {
-				"includeEncryptedReasoning": false,
-				"filterReasoningHistory": true,
+				"reasoningEffortMap": {
+					"minimal": "low",
+					"xhigh": "high",
+					"max": "high"
+				},
+				"includeEncryptedReasoning": true,
+				"filterReasoningHistory": false,
 				"supportsImageDetailOriginal": false,
-				"omitReasoningEffort": true
+				"omitReasoningEffort": false,
+				"supportsReasoningEffort": true
 			}
 		},
 		"grok-build": {

packages/catalog/src/provider-models/openai-compat.ts

@@ -1332,6 +1332,7 @@ export const XAI_OAUTH_CURATED_MODELS: readonly XAICuratedModel[] = [
 	},
 	{ id: "grok-4.3", contextWindow: 1_000_000, name: "Grok 4.3", input: ["text", "image"] },
 	{ id: "grok-4.5", contextWindow: 500_000, name: "Grok 4.5", input: ["text", "image"] },
+	{ id: "grok-4.6", contextWindow: 500_000, name: "Grok 4.6", input: ["text", "image"] },
 	// grok-4.20-multi-agent-0309 is text-only per the bundled catalog; omit `input` for the default.
 	{ id: "grok-4.20-multi-agent-0309", contextWindow: 2_000_000, name: "Grok 4.20 (Multi-Agent)" },
 	{

packages/catalog/test/identity-family.test.ts

@@ -340,6 +340,7 @@ describe("isGrokReasoningEffortCapable", () => {
 		expect(isGrokReasoningEffortCapable("grok-4.20-multi-agent")).toBe(true);
 		expect(isGrokReasoningEffortCapable("xai-oauth/grok-4.3")).toBe(true);
 		expect(isGrokReasoningEffortCapable("xai-oauth/grok-4.5")).toBe(true);
+		expect(isGrokReasoningEffortCapable("xai-oauth/grok-4.6")).toBe(true);
 		expect(isGrokReasoningEffortCapable("openrouter/xai/grok-3-mini")).toBe(true);
 	});